下列说法不正确的是[ ]凡有单质参加的化合反应都是氧化还原反应 B．所有的复分解反应都是非氧化还原反应 C下列说法不正确的是 [ ]凡有单质参加的化合反应都是氧化还原反应 B．所有的复分解反应都是非氧化还原反应 C．盐酸在参加的反应中只能作氧化剂 D．金属在参加的反应中只能作还原剂

A．①②

B．①③

C．③ ④

D．②④

e writing this letter to tell you that up to now no news has come from you about the goods we ordered on May 25th（）. We hope that you will try your best to arrange all this without further delay.

．hWe writing letter of complint to the mnger himself．But we’d like to her your opinion first．hve been thinking of B．hd thought of C．were thinking of D．thought of

A．have been thinking of

B．had thought of

C．were thinking of

D．thought of